Piston-packing.



PATENTE JULY 1o, ma.

C. A. GULLUM. PISTON PACKING. Pumumx rum) um. 14, moa.

Charte s A Guuum VIn each of these vrings2 and 2a.

UNITED STATES PATENT OFFICE p Spacication of Letters Patent.

Patented Joly 10,1906.

Application lell Augnat 14, 1905. Serial No. 274,179.

Afo all whom it lowly concern:

Beit known that I, CHARLES A. GULLUM,a kcitizen of the United States, residing at Columbus, in the count of Franklin and State of Ohio, have invente certain neviT and useful Improvements in Piston-Packings; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is an im rovement on Letters Patent of the United tetes No. 341,138, dated May 4, i886, its object heingto simplif'y and elleapen the construction and make 1t more eife'ctive in use. p

In the accompanying drawings, illustrating an embodiment of the improvementaFigure 1l isa side elevatiolnpartially in section; and

Fig. 2 is a detail oross-seotlonalview taken on the radial plane fr, Fig. 1`.

In the views, 1 designates the bull-ring, which is a solid or integral structure, and has ,at its outer side two oiroumarnbient grooves l, the said walls of which grooves are parallel. ooves are sprung two split e ring 2 is of right-an' 'le cross-section, and the ring 2 is a plane t one or of restan ular cross-section and adapted to rest on t ehorizontal flange of the rin 2.

eaoll other by means of a iateral pin2V on the ring 2a, that enters a transverse slot in the vertical flange of the ring 2.

3 designates seats having lugs 3, that pro jest from the inner sido of the bull ring throu h openings 1b therein into the groovesY The rings 2 and 2 are plaeed to-V get er to break goints, andthey are limited 1n their annular movement with res ect to' tional nuts 7a. The rin s 2 and 2 are therefore yieldingl supporte The sides o the iston are closed by means of plates 8, secured) to the spider by bolts or screws entering lloies 4b.

With this construction a nearly pllnfeoftljfu closed oontaet between the iston and cylinder is secured, and because t e rings 2 and 2 are ieldinglv supported the packing accommo ates itself to inequalities in the diameter of the cylinder. 4

What I ol ,and desire to seoureby Let ters Patent, is-- 1. In a piston-'paokin the solid or integral bull-rino4 provided Wit a oirournarnbient groove Raving parallel Side walls, @meines 'with a pair of expansible rings in said groove one of which ailords a seat for the other.

2. In a pistonasking, the solid or integral bull-ring provi ed with a circnmalnbient groove having parallel, side Walls, combined with a pair of expansible rings in said groove, and means to limit the annular movement Vof tile rings with respect to eaoil other.

.Y 3. In a piston-pasion the solid or integral bull-rin provided Wit a eirelilnamlnent groove Vavin parallel, side Walls, combined 'with a pair o split expansibie rings in said .groove placed on each other to break joints,

and means for limiting the annular nlovement of the rings Withres ect to each other.

4. In a pistonaskin t e solid or integral bullring provi ed Wit a ciroumam'bient groove having parallel side Walls, combined with an expansible packing-ring in said groove, la seat having a lug for supporting said flicking-ring, the ider provided with a hub iiaving a Tsiiape groove, threaded T- bolt sliding into'and supported in said T- siiaped groove, and a spring and a nut on said bolt supporting yioldingly the aforesaid seat for the packing-ring.

In testimony whereof I ailix my signature in presenoe of two Witnesses.

CHARLES A. GULLUM.

Witnesses:

Gao. M. FlNoKEL, A. L. RALsToN. 

